18 – HOW TO UPDATE DATA IN DJANGO – INVOICE MANAGEMENT SYSTEM

1. Create a form for updating data

class InvoiceUpdateForm(forms.ModelForm):
	class Meta:
		model = Invoice
		fields = ['--']

2. Import the form created in step 1 then make a view to handle and process update request.

def update_invoice(request, pk):
	queryset = Invoice.objects.get(id=pk)
	form = InvoiceUpdateForm(instance=queryset)
	if request.method == 'POST':
		form = InvoiceUpdateForm(request.POST, instance=queryset)
		if form.is_valid():
			form.save()
			return redirect('/list_invoice')

	context = {
		'form':form
	}
	return render(request, 'entry.html', context)

3. Create a URL/PATH to pass the ID of the object to be updated

path('update_invoice/<str:pk>/', views.update_invoice, name="update_invoice"),

4. In the items_list page, and an anchor linked to the update URL/PATH

<td><a href="{% url 'update_invoice' instance.id %}">{{instance.name}}</a></td>